Alaptus klonx Triapitsyn

Serguei V. Triapitsyn, 2017, Revision of Alaptus (Hymenoptera: Mymaridae) in the Holarctic region, with taxonomic notes on some extralimital species, Zootaxa 4279 (1), pp. 1-92 : 39-41

Alaptus klonx Triapitsyn , sp. n.

( Figs 74–81 )

Type material. Holotype female [ UCRC] on slide ( Fig. 76 ) labeled: 1. “USA , Florida, Jefferson Co., Monticello , University of Florida North Florida Research & Educa-tion Center, 315. viii.2002, R. Mizell, III, MT at forest edge”; 2. “ Mounted by V. V. Berezovskiy 2015 in Canada balsam ”; 3. [magenta] “ Alaptus klonx Triapitsyn HOLOTYPE ♀ ”; 4. “ Det. by S. V. Triapitsyn 2015 ”; 5. [database label] “ Univ. Calif. Riverside Ent. Res. Museum UCRC ENT 382897 ” . The Malaise trap that captured the holotype had been installed by S.V. Triapitsyn and V.V. Berezovskiy in the former University of Florida North Florida Research & Education Center in Monticello , Florida, and then was kindly maintained for several years by Russell F. Mizell, III. The holotype is dissected into many parts under 3 coverslips; missing are scape of one antenna as well as F5–F5 of the other antenna, and also one hind wing . Paratypes: USA: MICHIGAN, Ingham Co., Meridian Charter Township, Legg Park (near Birchwood ), 42°41’37.3’’N 84°22’53.7’’W, 258 m, 14.viii.2015, T. Petrice (in canopy of Fraxinus americana ) [2 ♀ on points, 1 ♀ and 1 ♂ on slides, UCRC] . NEW YORK, Seneca Co., 4.5 mi. SW of Lodi, Silver Thread Vineyard, 42°33’45.5’’N 76°52’27.2’’W, 202 m, 30.vii–14.viii.2010, G. Loeb, S.V. Triapitsyn [1 ♀ on slide, UCRC] .

Description. FEMALE (holotype). Head very dark brown; scape and pedicel yellowish-light brown, flagellum brown; mesosoma almost white laterally, mesonotum brown except anterior scutellum light brown; legs yellowish, gaster dark brown.

Antenna ( Fig. 74 ) about as long as body, with scape (including radicle) about 2.9× as long as wide and smooth; pedicel slightly longer than F1; F1 the shortest funicle segment, F2 a little less than 6.0× as long as wide and the longest funicle segment, F4 almost as long as F3 and longer than F5; clava about 4.8× as long as wide, with 4 mps, a little shorter than combined length of F3–F5.

Mesosoma about 1.5× as long as wide. Fore wing ( Fig. 75 ) about 8.5× as long as wide; disc with a slight brownish tinge and a complete row of 20 setae closer to anterior margin besides the admarginal rows; longest marginal seta 3.2× maximum wing width. Hind wing ( Fig. 75 ) 17× as long as wide; disc more strongly infumate, with 1 row of setae closer to posterior margin; longest marginal seta 6.0× maximum wing width.

Ovipositor ( Fig. 77 ) longer than body, strongly exserted beyond apex of gaster (by about 0.5× its own total length), occupying its entire length, and 3.3× length of metatibia.

Measurements (µm) of the holotype. Body (measurement taken from the dry specimen prior to slidemounting) 347; gaster 326; ovipositor 571. Antenna: scape (including radicle) 70; pedicel 42; F1 38; F2 63; F3 52; F4 51; F5 45; clava 132. Fore wing 507:60; longest marginal seta 179. Hind wing 510:30; longest marginal seta 194.

Variation (slide-mounted paratypes except when indicated otherwise). Body length (dry-mounted, critical point dried specimens) 460–480 µm. Scape (including radicle) 3.4× as long as wide; pedicel about as long as F1; clava 3.6–5.1× as long as wide. Fore wing 8.1–8.6× as long as wide; disc with a complete row of 20–22 setae closer to anterior admarginal row (occasionally an additional seta present just behind the complete row of setae, near apex); longest marginal seta 2.9× maximum wing width. Hind wing with longest marginal seta 5.9× maximum wing width. Ovipositor 2.8–3.0× length of metatibia.

MALE (paratype). Body length (slide-mounted specimen) 570 µm. Similar to female except for normal sexually dimorphic features and the following. Antenna ( Fig. 80 ) with scape (including radicle) 2.8× as long as wide; all funicle segments longer than pedicel. Fore wing ( Fig. 81 ) 7.8× as long as wide, disc with 3 or 4 additional setae behind the complete row of setae in the widest part; hind wing 17× as long as wide. Genitalia as in Fig. 78 .

Diagnosis. Female of A. klonx is characterized by a very long ovipositor, which is longer than body and exserted beyond the gastral apex by about 0.5× its total length and 2.8–3.3× length of metatibia, and also by the fore wing disc with a complete row of 20–22 setae closer to the anterior margin. In two similar Holarctic species with very long, notably exserted ovipositors, A. terebrans and A. longicaudatus , the former has the ovipositor shorter than body, 2.2–2.6× (but in the tentatively identified specimens from the USA 2.8–3.0×) length of metatibia, and exserted at most by about a third of its total length, whereas in the latter it is 3.7–3.9× length of metatibia and exserted by about 0.7× its own total length. Alaptus klonx , which has the mesosoma almost white laterally ( Fig. 79 ), is definitely more similar to A. terebrans whose mesosoma is always brown laterally.

Etymology. The species name is a noun in apposition and a combination of letters without any meaning.

Hosts. Unknown.

Figures

FIGURES 74 – 77. Alaptus klonx sp. n. ♀ (holotype). 74, antenna; 75, fore and hind wings; 76, slide; 77, gaster.

FIGURES 78 – 81. Alaptus klonx sp. n. (paratypes). 78, ♂ genitalia; 79, ♀ habitus (dry-mounted, critical point dried specimen from Legg Park, Meridian Charter Township, Ingham Co., Michigan, USA); 80, ♂ antenna; 81, ♂ fore wing.